In previous versions, when you select an item in the inventory you were able to move it like in the PC (be able to grab the item and drag through the interface), this made it possible to do a better inventory management but now the classic interface only allows to move an object from one slot to another like in the Pocket interface
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I can't stand it, like you have to actually hold an item to see it's name which is horrible when dealing with enchanted books
Thank you for your report!
However, this issue has been closed as a Duplicate of MCPE-30516.
If you have not, you might like to make use of the search feature before making a new ticket, as it's likely that the issue has been reported already.
Additionally, if you have feedback about the newer UI changes, please visit the Minecraft Feedback Site.
One such suggestion has been made already which you could vote for if you agree: https://feedback.minecraft.net/forums/578101-minecraft-bedrock/suggestions/33766096-new-ui-improvements-beta-feedback
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I noticed the same thing and I don't like it.